Epinephrine acts as a signal molecule that attaches to _____ proteins.

-receptor tyrosine kinase
-intracellular receptor
-ion-channel receptor
-nuclear receptor
-G-protein-linked receptor


G-protein-linked receptor

Biology & Microbiology

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How many origins of replication does the E. coli chromosome contain?

A) none B) 1 C) 2 D) 3 E) many

Biology & Microbiology

Ureaplasma conserves energy and compensates for an absent electron transport chain by creating chemiosmotic energy gradients and ATP from the breakdown of ________ into ammonia/ammonium.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

In June 2001 an announcement was made that a draft sequence of the ____________________ nucleotides in the

human genome had been finished. a. 350 million b. 990 million c. 1.1 billion d. 3.2 billion e. 56 billion

Biology & Microbiology

During a bacterial infection, the human body usually responds by having an elevated body temperature or a fever. Most over-the-counter cold medications indicate that they contain a fever suppressant

Explain why this is not always good for the treatment of a cold or infection.

Biology & Microbiology